Outgoing beta.messages.create API dispatch requests may now attach a header identifying the query as a "side query." If such a request fails with a 5xx error, a connection error, or a 408/409/429 with retries remaining, it is retried once without the header or the maxRetries override, and telemetry is emitted for the fallback.
API dispatch requests can now include a side-query header with fallback retry
Side-query API requests now retry once without the side-query header on certain failures.
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
API ConfigurationArea: what it touches
Internal ChangesKind: in v2.1.260,
Internal ChangesSection of the release